JAVA WindowBuilder 制作的简易粗暴的计算器

JAVA WindowBuilder 制作的简易粗暴的计算器，适合初学者。 package 计算器; import java.awt.BorderLayout; import java.awt.EventQueue; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.util.regex.Matcher; import java.util.regex.Pattern; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextField; import javax.swing.border.EmptyBorder; import javax.swing.GroupLayout; import javax.swing.GroupLayout.Alignment; import javax.swing.LayoutStyle.ComponentPlacement; public class 计算器5 extends JFrame { private JPanel contentPane; private JTextField textField; private double v1, v2, value; private char operator; private boolean reop = false; /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { 计算器5 frame = new 计算器5(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); }

package 计算器;

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.swing.JButton;
import javax.swing.Jframe;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.Layoutstyle.ComponentPlacement;

public class 计算器5 extends Jframe {

	private JPanel contentPane;
	private JTextField textField;
    private double v1 v2 value;
    private char operator;
    private boolean reop = false;
    

	/**
	 * Launch the application.
	 */
	public static void main（String[] args） {
		EventQueue.invokeLater（new Runnable（） {
			public void run（） {
				try {
					计算器5 frame = new 计算器5（）;
					frame.setVisible（true）;
				} catch （Exception e） {
					e.printStackTrace（）;
				}
			}
		}）;
	}
	public static int getSubCount_2（String str String key） {
        int count = 0;
        int index = 0;
        while （（index = str.indexOf（key index）） != -1） {
            index = index + key.length（）;

            count++;
        }
        return count;
    }
	/**
	 * Create the frame.
	 */
	public 计算器5（） {
		setResizable（false）;
	
		
		JButton button_4 = new JButton（“0“）;
		button_4.addActionListener（new ActionListener（） {
			public void actionPerformed（ActionEvent e） {
				
				if（reop ==true&&oo==1） textField.setText（““）;
				if（（textField.getText（）.indexOf（‘0‘）==-1||textField.getText（）.charAt（0）!=‘0‘||textField.getText（）.indexOf（‘0‘）				String text = textField.getText（） +‘0‘;
                textField.setText（text）;oo=0;
                }
				
			}
		}）;
		
		JButton btnNewButton = new JButton（“7“）;
		btnNewButton.addActionListener（new ActionListener（） {
			public void actionPerformed（ActionEvent e） {
				if（reop ==true&&oo==1）textField.setText（““）;
				String text = textField.getText（） +‘7‘;
                textField.setText（text）;oo=0;
			}
		}）;
		
		JButton btnNewButton_1 = new JButton（“4“）;
		btnNewButton_1.addActionListener（new ActionListener（） {
			public void actionPerformed（ActionEvent e） {
				if（reop ==true&&oo==1）textField.setText（““）;
				String text = textField.getText（） +‘4‘;
                textField.setText（text）;oo=0;
			}
		}）;
		
		JButton btnNewButton_2 = new JButton（“1“）;
		btnNewButton_2.addActionListener（new ActionListener（） {
			public void actionPerformed（ActionEvent e） {
				if（reop ==true&&oo==1）textField.setText（““）;
				String text = textField.getText（） +‘1‘;
                textField.setText（text）;oo=0;
			}
		}）;
		
		JButton btnNewButton_3 = new JButton（“8“）;
		btnNewButton_3.addActionListener（new ActionListener（） {
		
			public void actionPerformed（ActionEvent e） {
				if（reop ==true&&oo==1）textField.setText（““）;
				String text = textField.getText